Status of the Genus Pisonia L. (Nyctaginaceae) in Andaman & Nicobar Islands, India
Debasmita Dutta Pramanick*, G. G. Maiti and M. S. Mondal
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Abstract: The family Nyctaginaceae is represented by 6 genera and 14 species in India of which the genus Pisonia L. is the most significant genus due to its woody, arborescent habit, differential leaf arrangement pattern, presence of unisexual, hermaphrodite and polymorphic flowers in same and or different plants, unique characters of anthocarps and distinct types of pollen grains. During carrying out the taxonomic revision of the family Nyctaginaceae in India, the first author has emphasized the genus Pisonia with detailed account of infra-generic taxa. The present paper deals with current status of the species of Pisonia in Andaman & Nicobar Islands, along with their correct nomenclature, diagnostic characters, phenology, ecology, distribution and uses. A key has been provided to help in easy identification of the species.
Fig.: Pisonia aculeata L. (Male plant): A, A portion of flowering twig; B, Floral bract; C, Flower; D, Stamens surrounding rudimentary carpel; E, Stamen; F, Rudimentary carpel; [A–F: R.K. Premnath 8451(CAL)].